Yi Injong

Yi Injong (10 March 1515-8 August 1545) was the King of Joseon from 1544 to 1545, succeeding Yi Jungjong and preceding Yi Myeongjong.

Biography
Yi Injong was the son of Yi Jungjong and Janggyeong, and he succeeded his father as king of Joseon in 1544. Injong was an ambitious ruler, but he had to deal with many internal problems. His infrastructure was in ruins, his upkeep costs for his various armies posted in garrisons were high, his treasury in 1545 was only 2,000 mun, and the southern cities had a high risk of revolt, with Japanese and Korean farmers both rebelling against him if he moved his soldiers away. He harbored ideas of conquering Tsushima and other islands off the coast of Japan, and under his rule the kingdom of Joseon began its projects to create an empire in both Korea and Japan. Because he did not have a wife or children, he adopted Nam Chi Geun as his own son and heir.